Conservatory Lab Charter School (Ranked Bottom 50% for 2025-26)

Bottom 50%

Serving 444 students in grades Prekindergarten-8, Conservatory Lab Charter School ranks in the bottom 50% of all schools in Massachusetts for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).

The percentage of students achieving is 29% (which is lower than the Massachusetts state average of 42%). The percentage of students achieving is 37% (which is lower than the Massachusetts state average of 44%).

The student-teacher ratio of 15:1 is higher than the Massachusetts state level of 12:1.

Minority enrollment is 96% of the student body (majority Black), which is higher than the Massachusetts state average of 47% (majority Hispanic and Black).

Quick Facts (2025-26)

School Type: Charter School
Grades: Prekindergarten-8
Enrollment: 444 students
Student-Teacher Ratio: 15:1
Minority Enrollment: 96%
: Bottom 50% in MA
: 29% (Btm 50%)
: 37% (Btm 50%)
: 30-34% (Btm 50%)
Source: National Center for Education Statistics (NCES), MA Dept. of Education

School Overview

Conservatory Lab Charter School's student population of 444 students has stayed relatively flat over five school years.

The teacher population of 30 teachers has grown by 20% over five school years.

School Type

Charter School

Grades Offered

Grades Prekindergarten-8
(Supplemental Virtual)

View Data

Distribution of Students By Grade Trends
Grade	Conservatory Lab Charter School
Pre-K	45
Kind	51
1	52
2	51
3	53
4	56
5	46
6	42
7	28
8	20

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Total Students

444 students

View Data

Total Students Trends Over Years (2003-2023)
Year	Conservatory Lab Charter School
2023	454
2022	447
2021	457
2020	441
2019	441
2018	450
2017	450
2016	403
2015	393
2014	312
2013	180
2012	171
2011	154
2010	153
2009	135
2008	133
2007	132
2006	127
2005	135
2004	126
2003	117

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Gender %

Total Classroom Teachers

30 teachers

View Data

Total Classroom Teachers Trends Over Years (2005-2023)
Year	Conservatory Lab Charter School
2023	29
2022	30
2021	29
2020	25
2019	25
2018	22
2017	22
2016	27
2015	18
2014	14
2013	8
2012	9
2011	10
2010	14
2009	13
2008	15
2007	14
2006	17
2005	17

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Year Founded

1998

School Calendar

School Rankings

Conservatory Lab Charter School ranks within the bottom 50% of all 1,626 schools in Massachusetts (based off of combined math and reading proficiency testing data).

The of Conservatory Lab Charter School is 0.59, which is less than the diversity score at state average of 0.65. The school's diversity has stayed relatively flat over five school years.

This School

State Level (MA)

#1107 out of 1626 schools
(Bottom 50%)

View Data

Overall School Rank Trends Over Years (2012-2023)
Year	Conservatory Lab Charter School
2023	#1107
2022	#1200
2021	#1276
2019	#1269
2018	#1378
2017	#1433
2016	#1543
2015	#1324
2014	#1152
2013	#769
2012	#1082

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29%

42%

View Data

Math Proficiency Comparison Over Years (2012-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	29%	42%	29%
2022	20%	41%	20%
2021	18%	37%	18%
2019	33%	51%	33%
2018	30%	52%	30%
2017	27%	53%	27%
2016	33%	64%	33%
2015	47%	61%	47%
2014	57%	61%	57%
2013	77%	61%	77%
2012	52%	59%	52%

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37%

44%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2011-2022)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2022	37%	44%	37%
2021	34%	49%	34%
2019	44%	54%	44%
2018	41%	56%	30%
2017	34%	54%	34%
2016	43%	71%	43%
2015	52%	69%	52%
2014	52%	69%	52%
2013	57%	69%	57%
2012	62%	69%	62%
2011	54%	70%	54%

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30-34%

44%

View Data

Science Proficiency Comparison Over Years (2021-2022)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2022	32%	44%	32%
2021	32%	42%	32%

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Student-Teacher Ratio

15:1

12:1

View Data

Student-Teacher Ratio Comparison Over Years (2005-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	16:1	12:1	16:1
2022	15:1	12:1	15:1
2021	16:1	12:1	16:1
2020	18:1	13:1	18:1
2019	18:1	13:1	18:1
2018	20:1	13:1	20:1
2017	20:1	13:1	20:1
2016	15:1	13:1	15:1
2015	22:1	13:1	22:1
2014	22:1	14:1	22:1
2013	23:1	14:1	23:1
2012	19:1	14:1	19:1
2011	15:1	14:1	15:1
2010	11:1	14:1	11:1
2009	11:1	14:1	10:1
2008	9:1	14:1	9:1
2007	9:1	13:1	9:1
2006	7:1	13:1	7:1
2005	8:1	14:1	8:1

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American Indian

n/a

Asian

View Data

Asian Student Percentage Comparison Over Years (2003-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	3%	7%	3%
2022	2%	7%	2%
2021	2%	7%	2%
2020	3%	7%	3%
2019	3%	7%	3%
2018	2%	8%	2%
2017	2%	8%	2%
2016	4%	6%	4%
2015	4%	6%	4%
2014	5%	6%	5%
2013	9%	6%	9%
2012	8%	6%	8%
2011	7%	7%	7%
2010	3%	6%	3%
2009	6%	6%	6%
2008	6%	6%	6%
2007	6%	6%	6%
2006	7%	6%	7%
2005	4%	5%	4%
2004	4%	5%	4%
2003	5%	5%	5%

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Hispanic

42%

25%

View Data

Hispanic Student Percentage Comparison Over Years (2003-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	42%	24%	42%
2022	41%	23%	41%
2021	42%	22%	42%
2020	41%	21%	41%
2019	41%	21%	41%
2018	33%	19%	33%
2017	33%	19%	33%
2016	35%	19%	35%
2015	33%	18%	33%
2014	31%	17%	31%
2013	23%	16%	23%
2012	26%	16%	26%
2011	26%	15%	26%
2010	27%	15%	27%
2009	31%	14%	31%
2008	32%	15%	32%
2007	31%	14%	31%
2006	34%	13%	34%
2005	30%	12%	30%
2004	24%	12%	24%
2003	21%	11%	21%

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Black

49%

10%

View Data

Black Student Percentage Comparison Over Years (2003-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	47%	10%	47%
2022	48%	10%	48%
2021	48%	10%	48%
2020	49%	9%	49%
2019	49%	9%	49%
2018	51%	9%	51%
2017	51%	9%	51%
2016	45%	9%	45%
2015	44%	9%	44%
2014	37%	9%	37%
2013	40%	9%	40%
2012	37%	8%	37%
2011	38%	8%	38%
2010	38%	8%	38%
2009	36%	8%	36%
2008	36%	8%	36%
2007	40%	8%	40%
2006	36%	8%	36%
2005	40%	9%	40%
2004	47%	9%	47%
2003	47%	9%	47%

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White

53%

View Data

White Student Percentage Comparison Over Years (2003-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	5%	54%	5%
2022	6%	56%	6%
2021	5%	57%	5%
2020	5%	59%	5%
2019	5%	59%	5%
2018	11%	61%	11%
2017	11%	61%	11%
2016	11%	63%	11%
2015	15%	64%	15%
2014	19%	65%	19%
2013	25%	66%	25%
2012	25%	67%	25%
2011	25%	68%	25%
2010	26%	69%	26%
2009	22%	70%	22%
2008	23%	71%	23%
2007	20%	72%	20%
2006	21%	73%	21%
2005	23%	74%	23%
2004	25%	74%	25%
2003	27%	75%	27%

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Hawaiian

n/a

Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2009-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	3%	5%	3%
2022	3%	4%	3%
2021	3%	4%	3%
2020	2%	4%	2%
2019	2%	4%	2%
2018	3%	3%	3%
2017	3%	3%	3%
2016	5%	3%	5%
2015	4%	3%	4%
2014	8%	3%	8%
2013	3%	3%	3%
2012	4%	3%	4%
2011	3%	2%	3%
2010	5%	2%	5%
2009	4%	2%	4%

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All Ethnic Groups

0.59

0.65

View Data

Diversity Score Comparison Over Years (2003-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	0.60	0.64	0.60
2022	0.60	0.62	0.60
2021	0.60	0.62	0.60
2020	0.59	0.60	0.59
2019	0.59	0.60	0.59
2018	0.62	0.58	0.62
2017	0.62	0.58	0.62
2016	0.67	0.56	0.67
2015	0.68	0.55	0.68
2014	0.73	0.54	0.73
2013	0.72	0.53	0.72
2012	0.73	0.52	0.73
2011	0.74	0.51	0.73
2010	0.72	0.50	0.72
2009	0.73	0.51	0.73
2008	0.73	0.47	0.72
2007	0.72	0.46	0.71
2006	0.73	0.45	0.71
2005	0.70	0.43	0.70
2004	0.66	0.43	0.66
2003	0.67	0.42	0.67

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Participates in the

Yes

Eligible for

44%

35%

View Data

Free Lunch Eligibility Comparison Over Years (2004-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	43%	35%	43%
2022	44%	35%	44%
2021	43%	36%	43%
2020	45%	35%	45%
2019	45%	35%	45%
2015	50%	36%	50%
2014	53%	34%	53%
2013	47%	32%	47%
2012	47%	30%	47%
2011	49%	29%	49%
2010	44%	27%	44%
2009	54%	25%	54%
2008	50%	24%	50%
2007	51%	23%	51%
2006	61%	23%	61%
2005	55%	23%	55%
2004	52%	22%	52%

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Eligible for

13%

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2006-2023)
Year	Conservatory Lab Charter School	Massachusetts	Conservatory Lab Charter School District
2023	12%	4%	12%
2022	13%	4%	13%
2021	12%	4%	12%
2020	13%	4%	13%
2019	13%	4%	13%
2015	14%	4%	14%
2014	12%	5%	12%
2013	16%	5%	16%
2012	16%	5%	16%
2011	18%	5%	18%
2010	23%	6%	23%
2009	19%	6%	19%
2008	23%	5%	23%
2007	20%	5%	20%
2006	13%	5%	13%

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School Statewide Testing

School District Name

Conservatory Lab Charter School District

Source: National Center for Education Statistics (NCES), MA Dept. of Education

Profile last updated: 02/09/2025

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Frequently Asked Questions

What is Conservatory Lab Charter School's ranking?

Conservatory Lab Charter School is ranked #1107 out of 1,626 schools, which ranks it among the bottom 50% of public schools in Massachusetts.

What schools are Conservatory Lab Charter School often compared to?

Conservatory Lab Charter Schoolis often viewed alongside schools like Boston Renaissance Charter Public School by visitors of our site.

What percent of students have achieved state testing proficiency in math and reading?

29% of students have achieved math proficiency (compared to the 42% MA state average), while 37% of students have achieved reading proficiency (compared to the 44% MA state average).

How many students attend Conservatory Lab Charter School?

444 students attend Conservatory Lab Charter School.

What is the racial composition of the student body?

49% of Conservatory Lab Charter School students are Black, 42% of students are Hispanic, 4% of students are White, 3% of students are Two or more races, and 2% of students are Asian.

What is the student-teacher ratio of Conservatory Lab Charter School?

Conservatory Lab Charter School has a student ration of 15:1, which is higher than the Massachusetts state average of 12:1.

What grades does Conservatory Lab Charter School offer ?

Conservatory Lab Charter School offers enrollment in grades Prekindergarten-8 (Supplemental Virtual).

What school district is Conservatory Lab Charter School part of?

Conservatory Lab Charter School is part of Conservatory Lab Charter School District.

In what neighborhood is Conservatory Lab Charter School located?

Conservatory Lab Charter School is located in the Cedar Grove neighborhood of Dorchester, MA.